<template>
  <div>

    <div class="card" style="margin-bottom: 5px">
      <el-input clearable @clear="load" style="width: 260px; margin-right: 5px" v-model="data.username" placeholder="请输入账号查询" :prefix-icon="Search"></el-input>
      <el-input clearable @clear="load" style="width: 260px; margin-right: 5px" v-model="data.name" placeholder="请输入名称查询" :prefix-icon="Search"></el-input>
      <el-button type="primary" @click="load">查 询</el-button>
      <el-button type="info" @click="reset">重 置</el-button>
    </div>
    <div class="card" style="margin-bottom: 5px">
      <el-button type="primary" @click="handleAdd">新  增</el-button>
      <el-button type="danger" @click="deleteBatch">删  除</el-button>
      <el-button type="warning" @click="exportData">导  出</el-button>
      <el-upload
          style="display: inline-block; margin-left: 12px; vertical-align: middle"
          action="http://localhost:8080/user/import"
          :show-file-list="false"
          :on-success="handleImportSuccess"
      >
        <el-button type="success">导  入</el-button>
      </el-upload>
    </div>
    <div class="card" style="margin-bottom: 5px">
      <el-table :data="data.tableData" style="width: 100%" :header-cell-style="{ color: '#333', backgroundColor: '#ddd' }" @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="55" />
        <el-table-column label="头像" width="100">
          <template #default="scope">
            <el-image :v-if="scope.row.avatar" :src="scope.row.avatar" :preview-src-list="[scope.row.avatar]" :preview-teleported="true" style="width: 40px; height: 40px; border-radius: 50%; display: block" />
          </template>
        </el-table-column>
        <el-table-column prop="username" label="账号" />
        <el-table-column prop="name" label="名称" />
        <el-table-column prop="phone" label="电话" />
        <el-table-column prop="email" label="邮箱" />
        <el-table-column label="操作" width="100">
          <template #default="scope">
            <el-button type="primary" icon="Edit" circle @click="handleEdit(scope.row)"></el-button>
            <el-button type="danger" icon="Delete" circle @click="del(scope.row.id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
    </div>
    <div class="card" style="margin-bottom: 5px">
      <el-pagination
          v-model:current-page="data.pageNum"
          v-model:page-size="data.pageSize"
          :page-size="data.pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :page-sizes="[5, 10, 20]"
          :total="data.total"
          @current-change="load"
          @size-change="load"
      />
    </div>

    <el-dialog title="用户信息" v-model="data.dialogFormVisible" width="25%" destroy-on-close> <!-- destroy-on-close 关闭后销毁 —— 即重置表单 -->
      <el-form ref="formRef" :model="data.form" :rules="data.rules" label-width="80px" style="padding: 20px 30px 10px 0">
        <el-form-item prop="username" label="账号">
          <el-input v-model="data.form.username" autocomplete="off" placeholder="请输入账号" />
        </el-form-item>
        <el-form-item prop="name" label="名称">
          <el-input v-model="data.form.name" autocomplete="off" placeholder="请输入名称" />
        </el-form-item>
        <el-form-item prop="phone" label="电话">
          <el-input v-model="data.form.phone" autocomplete="off" placeholder="请输入电话" />
        </el-form-item>
        <el-form-item prop="email" label="邮箱">
          <el-input v-model="data.form.email" autocomplete="off" placeholder="请输入邮箱" />
        </el-form-item>
        <el-form-item prop="avatar" label="头像">
          <el-upload
              action="http://localhost:8080/files/upload"
              :headers="{ token: data.user.token }"
              :on-success="handleFileSuccess"
              list-type="picture"
          >
            <el-button type="primary">上传头像</el-button>
          </el-upload>
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button @click="data.dialogFormVisible = false">取 消</el-button>
          <el-button type="primary" @click="save">保 存</el-button>
        </div>
      </template>
    </el-dialog>

  </div>
</template>

<script setup>

import { reactive, ref } from 'vue'
import {Search} from "@element-plus/icons-vue";
import request from "@/utils/request.js";
import {ElMessage, ElMessageBox} from "element-plus";

const data = reactive({
  user: JSON.parse(localStorage.getItem('code_user') || '{}'),
  username: null,
  name: null,
  pageNum: 1,
  pageSize: 5,
  total: 0,
  tableDate: [],
  formVisible: false,
  form: {},
  rules: {
    username: [
      { required: true, message: '请输入账号', trigger: 'blur' }
    ],
    name: [
      { required: true, message: '请输入名称', trigger: 'blur' }
    ],
    phone: [
      { required: true, message: '请输入电话', trigger: 'blur' }
    ],
    email: [
      { required: true, message: '请输入邮箱', trigger: 'blur' }
    ]
  },
  rows: [],
  ids: []
})

const formRef = ref()

const load = () => {
  request.get('/user/selectPage', {
    params: {
      pageNum: data.pageNum,
      pageSize: data.pageSize,
      username: data.username,
      name: data.name
    }
  }).then(res => {
    if (res.code === '200') {
      data.tableData = res.data.list
      data.total = res.data.total
    } else {
      ElMessage.error(res.msg)
    }
  })
}
load()

const reset = () => {
  data.name = null
  data.username = null
  load()
}

const handleAdd = () => {
  data.dialogFormVisible = true
  data.form = {}
}

const add = () => {
  // formRef 是表单的引用
  formRef.value.validate((valid) => {
    if (valid) {  // 验证通过
      request.post('/user/add', data.form).then(res => {
        if (res.code === '200') {
          data.dialogFormVisible = false
          ElMessage.success('新增成功')
          load()
        } else {
          ElMessage.error(res.msg)
        }
      })
    }
  })
}

const handleEdit = (row) => {
  data.form = JSON.parse(JSON.stringify(row)) // 深度拷贝数据
  data.dialogFormVisible = true
}

const update = () => {
  formRef.value.validate((valid) => {
    if (valid) {
      request.put('/user/update', data.form).then(res => {
        if (res.code === '200') {
          data.dialogFormVisible = false
          ElMessage.success('修改成功')
          load()
        } else {
          ElMessage.error(res.msg)
        }
      })
    }
  })
}

const save = () => {
  data.form.id ? update() : add()
}

const del = id => {
  ElMessageBox.confirm('删除后无法复原，确认删除吗?', '提示', { type: 'warning' }).then(res => {
    request.delete('/user/delete/' + id).then(res => {
      if (res.code === '200') {
        ElMessage.success('删除成功')
        load()
      } else {
        ElMessage.error(res.msg)
      }
    })
  }).catch(err => {})
}

const handleSelectionChange = (rows) => {  // 选中的行
  data.rows = rows
  data.ids = data.rows.map(v => v.id) // map可以把对象的数组转换成一个纯数字的数组
}

const deleteBatch = () => {
  if (data.rows.length === 0) {
    ElMessage.warning('请选择要删除的数据')
    return
  }
  ElMessageBox.confirm('删除后无法复原，确认删除吗?', '提示', { type: 'warning'}).then(res => {
    request.delete('/user/deleteBatch', {data: data.rows}).then(res => {
      if (res.code === '200') {
        ElMessage.success('批量删除成功')
        load()
      } else {
        ElMessage.error(res.msg)
      }
    })
  }).catch(err => {})
}

const exportData = () => {
  let idsStr = data.ids.join(",") // 把数组转换成字符串  [1,2,3] -> "1,2,3"
  let url = `http://localhost:8080/user/export?username=${data.username === null ? '' : data.username}`
  + `&name=${data.name === null ? '' : data.name}`
  + `&ids=${idsStr}`
  + `&token=${data.user.token}`
  window.open(url)
}

const handleImportSuccess = (res) => {
  if (res.code === '200') {
    ElMessage.success('导入成功')
    load()
  } else {
    ElMessage.error(res.msg)
  }
}

const handleFileSuccess = (res) => {
  data.form.avatar = res.data
}

</script>
